netdev - RE: [PATCH 1/3] net: mdio-gpio: Use devm

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Message-ID: <724F6C6CDC8C86478473775085778C4E09E85E3A@ImsEx1.ims.dom>
Date:	Wed, 16 Apr 2014 02:50:08 +0000
From:	Chris Healy <chealy@...co-us.com>
To:	Guenter Roeck <linux@...ck-us.net>,
	Florian Fainelli <f.fainelli@...il.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"cphealy@...il.com" <cphealy@...il.com>
Subject: RE: [PATCH 1/3] net: mdio-gpio: Use devm_ functions where possible

This simplifies error path and deinit/removal functions.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Tested-by: Chris Healy <cphealy@...il.com>
---
 drivers/net/phy/mdio-gpio.c |   19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
index e701433..e853066 100644
--- a/drivers/net/phy/mdio-gpio.c
+++ b/drivers/net/phy/mdio-gpio.c
@@ -110,7 +110,7 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,
        struct mdio_gpio_info *bitbang;
        int i;

-       bitbang = kzalloc(sizeof(*bitbang), GFP_KERNEL);
+       bitbang = devm_kzalloc(dev, sizeof(*bitbang), GFP_KERNEL);
        if (!bitbang)
                goto out;

@@ -121,7 +121,7 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,

        new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
        if (!new_bus)
-               goto out_free_bitbang;
+               goto out;

        new_bus->name = "GPIO Bitbanged MDIO",

@@ -138,11 +138,11 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,

        snprintf(new_bus->id, MII_BUS_ID_SIZE, "gpio-%x", bus_id);

-       if (gpio_request(bitbang->mdc, "mdc"))
+       if (devm_gpio_request(dev, bitbang->mdc, "mdc"))
                goto out_free_bus;

-       if (gpio_request(bitbang->mdio, "mdio"))
-               goto out_free_mdc;
+       if (devm_gpio_request(dev, bitbang->mdio, "mdio"))
+               goto out_free_bus;

        gpio_direction_output(bitbang->mdc, 0);

@@ -150,12 +150,8 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,

        return new_bus;

-out_free_mdc:
-       gpio_free(bitbang->mdc);
 out_free_bus:
        free_mdio_bitbang(new_bus);
-out_free_bitbang:
-       kfree(bitbang);
 out:
        return NULL;
 }
@@ -163,13 +159,8 @@ out:
 static void mdio_gpio_bus_deinit(struct device *dev)
 {
        struct mii_bus *bus = dev_get_drvdata(dev);
-       struct mdio_gpio_info *bitbang = bus->priv;

-       dev_set_drvdata(dev, NULL);
-       gpio_free(bitbang->mdio);
-       gpio_free(bitbang->mdc);
        free_mdio_bitbang(bus);
-       kfree(bitbang);
 }

 static void mdio_gpio_bus_destroy(struct device *dev)
--
1.7.9.7


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